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Article 4: Overlay Zoning Districts 21 <br /> Section 4.2:Watershed Protection <br /> 4.2.5 Impervious Surface and Detention Pond Requirements for Residential Uses <br /> SURFACE/DETENTIONTABLE 4.2.5.1: IMPERVIOUS POND REQUIREMENTS <br /> DISTRICT IMPERVIOUS SURFACE/DETENTION . REQUIREMENTS <br /> 6% impervious surface limit. <br /> EXCEPT for all lots which existed prior to 4/2/90,which are subject to impervious surface <br /> limits as provided in the following Table(entitled Sliding Scale for Residential Impervious <br /> UNIV-CA Surface Ratios—Univ, Cane, and Little). [1], [2] <br /> UNIV-PW Lots shall either be a minimum of 2 acres in area, exclusive of any right-of-way or access <br /> easement, or created in accordance with established density regulations through the <br /> subdivision process to qualify for additional impervious surface allocation as detailed in <br /> Section 4.2.8 C . <br /> 6% impervious surface limit. <br /> EXCEPT for lots smaller than two acres which existed prior to 1/1/94,which are subject to <br /> impervious surface limits as provided in the following Table(entitled Sliding Scale for <br /> CANE-CA Residential Impervious Surface Ratios—Univ, Cane, and Little). [1], [2] <br /> CANE-PW Lots shall either be a minimum of 2 acres in area, exclusive of any right-of-way or access <br /> easement, or created in accordance with established density regulations through the <br /> subdivision process to qualify for additional impervious surface allocation as detailed in <br /> Section 4.2.8 C . <br /> 6% impervious surface limit. <br /> U-ENO-CA EXCEPT for lots smaller than five acres which existed prior to 6/1/2010,which are subject to <br /> impervious surface limits as provided in the following Table(entitled Sliding Scale for <br /> Residential Impervious Surface Ratios—Upper Eno). [11, 2 <br /> 6% impervious surface limit. <br /> EXCEPT for lots which existed prior to 1/1/94, which are subject to impervious surface limits <br /> as provided in the following Table(entitled Sliding Scale for Residential Impervious Surface <br /> LITTLE-PW Ratios- Univ, Cane, and Little). [1], [2] <br /> Lots shall either be a minimum of 2 acres in area, exclusive of any right-of-way or access <br /> easement, or created in accordance with established density regulations through the <br /> subdivision process to qualify for additional impervious surface allocation as detailed in <br /> Section 4.2.8 C . <br /> FLAT-PW 12% impervious surface limit for new and existing lots. [1], [2] <br /> HYCO-PW <br /> 12% impervious surface limit for existing and new lots outside of Transition Areas as <br /> designated in the Orange County Land Use Plan. [1], [2] <br /> 30% impervious surface limit for developments which exceed a density 1 du/acre within <br /> Transition Areas as designated in the Orange County Land Use Plan. c+.,, +,,. ❑IMPS <br /> B ACK-PW ENO-PW Stormwater control measures (SCMs)are required if impervious surface exceeds 12%. <br /> 70% impervious surface limit for residential uses developed at"high intensity"densities(R- <br /> 5, R-8, and R-13) in an Economic Development District as designated in the Land Use <br /> Element of the Comprehensive Plan (high-density option)with c+r,.n+,.ral RnADcSCMs if ISR <br /> exceeds12%. <br /> 24% impervious surface limit with curb and gutter. <br /> 36% impervious surface limit without curb and gutter. <br /> [1], [2] <br /> 70% impervious surface limit for residential uses developed at"high intensity"densities(R- <br /> L-ENO-PW 5, R-8, and R-13)in an Economic Development District as designated in the Land Use <br /> Element of the Comprehensive Plan (high-density option),with structural BMPSSCMs <br /> required when impervious surface exceeds: <br /> 24% (w/curb and gutter); or <br /> 36% w/o curb and gutter). <br /> HAW-PW 24% impervious surface limit. [1], [2] <br /> JORDAN-PW <br /> [1]Allowable impervious surface area may be modified in accordance with Section 4.2.8 of the UDO. <br /> [2] Regardless of the proposed amount of impervious surface area, a st r,,,water feature/best management practice <br /> ONAR)SCM may still be required based on the proposed amount of land disturbance on a given parcel of property in <br /> accordance with applicable Orange County Erosion Control and State Stormwater regulations. <br /> Orange County, North Carolina—Unified Development Ordinance Page 4-6 <br />